Review dates, retention estimates and daily workload for spaced repetition

Answeringour last check, 2026-10-26

1 of 1checks answered this week

541 msmedian answer time

$0.01listed price per call

$0.01price it asked us

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

GET https://saylorinnovations.com/api/study/spaced-repetition

Category	Everything else
Provider host	saylorinnovations.com
Networks	eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
Payment schemes	exact
Self-reported calls, 30 days	1 from 1 payers (the provider's figure, not ours)

Our checks, last 30 days

Day	Result	HTTP	Asked	Time
2026-10-26	valid payment request	402	$0.01	541 ms

Example input (from the provider)

{
  "method": "GET",
  "queryParams": {
    "grades": "4,4,3,5,4,4",
    "method": "sm2",
    "new_cards_per_day": "20",
    "retention_target": "90",
    "seconds_per_review": "8",
    "start_date": "2026-11-01"
  },
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "grades": {
              "description": "optional SM-2 recall grades 0-5 for each review separated by commas, default all 4 (query)",
              "type": "string"
            },
            "method": {
              "description": "optional sm2 (default), leitner or expanding (query)",
              "type": "string"
            },
            "new_cards_per_day": {
              "description": "optional new cards added per day for the workload estimate (query)",
              "type": "string"
            },
            "retention_target": {
              "description": "optional target retention percent, default 90 (query)",
              "type": "string"
            },
            "seconds_per_review": {
              "description": "optional average seconds per card review, default 8 (query)",
              "type": "string"
            },
            "start_date": {
              "description": "required first study date YYYY-MM-DD (query)",
              "type": "string"
            }
          },
          "required": [
            "start_date"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "const": "json",
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}

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